Standard for electric wires



(No Model.)

E. G. MORGAN.

STANDARD EOE ELECTRIC WIRES.

Patented May 17, 1892.

Ihvirnn rares PATENT Ori-rica.

EDMUND C. MORGAN, OF CHICAGO, ILLINOIS.

STANDARD FOR ELECTRIC WIRES.

SPECIFICATION forming part of Letters Patent N o. 474,847, dated May1*?, 1892.

Application filed October 19', 1891. Serial No. 409,240%. (No model.)

To @ZZ whom it may concern:

Be it known that I, EDMUND C. MORGAN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented a new and useful Improvement in Extensible Standards forElectric Wires, of which the following is a specification.

This invention relates to a stand or support for electric wires; and itconsists in substantially the construction pointed out in the followingspecification and claims.

Like letters and figures refer to the same parts in the several figuresof the drawings, in which- Figure l is a side elevation of one form ofthe invention. Fig. 2 is a front elevation of the same.

My invention maybe carried out by a variety of construct-ions; but thepreferred form is shown in Figs. l and 2 of the drawings and will now bedescribed. 1

A designates a post with a pointed or sharp lower end and with a lug orbracket a cast upon or otherwise rigidly secured to its upper end. Thislug or bracket has an opening therethrough for the passage of thestandard B, whose position therein may be fixed by the set-screw b orotherwise. This standard may have formed integrally therewith or rigidlyaffixed thereto an arm E, and suitable sharp points c should be made toproject above the standard and arm. To the outer end of the standard maybe properly secured any suitable or Well-known form of clamp, such as d,for an electric Wire e. This clamp is not specially described, for itsconstruction forms no part of my invention; but some sort of insulation,such as f, should be interposed between the clamp and arm. One end of ascrewthreaded rod C rests upon the top of the post A and the other endof such rod passes through a nut formed in the bevel-gear g, whichlatter is supported upon a bracket formed on the lower end of a bar D,and said bevel meshes with a miter h, carried by the same bracket andcapable of being revolved by a handle t'. The bar D extends to and restsagainst the arm E, and the screw-threaded rod after passing through thenut in the bevel extends behind the bar, or in case the bar is a yokebetween the branches of the yoke, as indicated in dotted lines.

The operation of this construction is as follows: The electric wirehaving been secured in the clamp, or frequently before the wireisclamped, the whole 'device (which I term an extensible stand is placedso that the points at its opposite ends are adjacent to the bottom andtop or other opposing walls of the mine, and the bevel-wheels arerotated, so as to cause the screw-threaded rod to revolve, andconsequently force the pointed post and standard in different directionsuntil the points take a firm hold in the walls of the mine, when theymay be set to such position by adjusting the set-screw l. It will beunderstood that by the construction shown in Figs. l and 2 of thedrawings the screw-threaded-rod forces the bar D upward against andlifts the arm E, together with the points c and the standard B, andpushes downward the post A.

While my extensible standard is particularly designed for, carrying thewires for a trolley system in a mine, yet it is adapted to carry theWires for electric light and various other systems.

It is obvious many variations may be made in the details ot' theextensible standard for carrying electric wires Without departing fromthe principle of my invention.

What I claim, and desire to secure by Letters Patent, is-

l. An extensible standard for supporting electric wires and similarpurposes, comprising a supporting-post, an independent frame providedwith a holder or clamp for the device to be supported, andascrew-threaded rod resting loosely against one of the abovementionedparts and carrying a nut which supports the other of such parts,substantially as and for the purpose set forth.

2. An extensible support for electric Wires and similar purposes,comprising a post, an independent frame provided with a clamp or holderfor the wire or similar device, and an intermediate section restingloosely upon the post and supporting the frame, and mechanism foradjusting or extending the intermediate section in the direction of itslength, all substantially asand for the purpose set forth.

3. An extensible standard for electric wires and similar purposes,comprising a post, a superposed frame for carrying the wire or similardevice and guided by the post, an inter- IOO set-screw, an intermediatesection composed of a screw-threaded rod and a nut resting looselyagainst the upper end of the post and the horizontal arm or the frame,and bevelgearing carried by the nut and arranged to rotate thescrew-threaded rod, substantially as and for thev purpose set forth.

EDMUN D C. MORGAN.

Witnesses:

J. LAWRENCE GERRY, WM. J. STAPLETON.

